Scott Foresman Social Studies
Excellent resource for current events and social studies activities.
Scott Foresman Social Studies - Spanish
Excellent resource for current events and social studies activities.
Kids.gov
Kids.gov is the official kids' portal for the U.S. government. It links to over 2,000 web pages from government agencies, schools, and educational organizations, all geared to the learning level and interest of kids.
50 States.com
Extensive collection of factual information about each of the United States and their capitals.